Polishing apparatus for rolls



Feb. 17,1942. P. K. PxsARclK POLISHING APPRATUS FOR ROLLS Filed sept. 14, 1940 5 Sheng-sheet 1 ATTORNEYJ.

Feb. 17, 1942. l P. K. PlsARclK 2,273,590

y POLISHING APPARATUS FOR ROELS l AFiled sept. 14, l1940 5 sheets-Sheet 2 BY @n 162/ ATTORNEYS.

5 Sheets-Sheet 4 P. K. PISARCIK POLISHING APPARATUS FOR ROLLS F'iled Sept. 14, 1940 Feb. y 17, 1942.

Feb. 17, 1942. v P. K. PlsARcn(` 2,273,590

POLISHING APPARATUS FOR ROLLS Filed Sept. 14, 1940 5 Sheets-Sheet 5 ATTORNEYJ.

Patented Feb. 17, 1942` UNITED STATES PATENT OFFICE PoLIsHINGv APPARATUS Fon RoLLs' e Pauli; Pisarcik, East vanaergrift, Pa. 4ApplicationSeptember 14, 1940, Serial N0. $456,784 17 claims. (C1. 51253 My invention relates to automatically operable roll polishing apparatus for polishingthe rolls of a mill and especially a two high sheet mill, for example. The invention is particularly designed to do away with the laboriousand unsatisfactory manual methods of polishing and/or treating the rolls as now very generally followed in commercial mill operations. v

I am aware that mechanical polishing apparatus for polishing the rolls of mills of the character under consideration have been devised, but such apparatus have not proven entirely satisfactory when applied to and attempted to be employed in connection with such mills in cornparison with the present invention.

My invention contemplates the employment of automaticallyY operable polishing means designed for application to and for polishing either the lower or the upper roll or both rolls, of a two high mill; said means being capable of being used while the mill is in operation.

Among the objects of my invention are; the provision of a plurality of independentI polishing stones adapted to be positioned adjacent a roll and extend across the major portion of the width or working surface of the roll to be treated;` means for effecting a relatively slight lateral movement of the stones along the surface or working face of a roll, a new and improved construction enabling the polishing apparatus for either or both the lower and upper rolls to be connected with the coupling or coupling-box asfUl 'theblocks or stones by proper ccunterweighting;gto provide separate relatively small stones or' blocks each covering only a small area of the roll thereby eliminating the need for applying high pressure which wears the rolls down; and the provision of means for varying .the pollishing action at certain points along the width of the rolls when necessary.

In the accompanying drawings which illustrate applications of my invention:

Fig. l is aside or end elevational view of a two high mill showing an embodiment of my invention associated therewith and particularly designed for polishing the lower or bottom roll of the mill;

Fig. 2, a front elevational view;

Fig. 3, a front elevational view of the mill showing an embodiment of my invention particularly designed for polishing the upper or top roll of themill; y I

Fig, 4, an end elevational View of the form of Fig. 3;

Fig. 5, a View similar to Fig. 4 of the opposite end;

Fig. 6, a diagrammatic view showing several `housings and several pairs of rolls and the connections between the lower rolls;

Fig. 7, a diagrammatic view particularly illustrating the arcuate movements of the stones;

Fig. 8, a view like Fig. 4' particularly show- -ing the manner of connecting the connecting sociated with the lower rolls of the mill; means f for effecting simultaneous lateral movements of the stones for polishing both the lower and upper rolls; means for producing an arcuate or similar movement of the stones to effect a scrubbing action of the stones on the working face of a roll whereby a very efficient cleaning of the roll is accomplished; and new and improved means for effecting either a combined arcuate and lateral movement of the stones on the working face of a roll, or lateral movement only.

Other objects are,` to provide new and improved means for automatically reversing the slight lateral movement of the stones and the stone carriersv to provide a reciprocating movement of the polishing stones along the working face of a roll; and to provide a simple andeiiicient polishing apparatus that may be readily applied to a two high mill or the like of the usual construction.

Further objects are, to provide constructions i enabling the polishing apparatus tobe applied to a mill of any width; to save excessive wear on rods for the bottom and top polishing apparatus to a common pin on the eccentric strap;

Fig. 9, a detail view showing the mounting of one of the main levers with its stone holder; and

Fig. 10, a sectional detail view of the separable stone holder as carried by its lever arm.

Referring to the drawings the polishing apparatus embodying my invention is designed to be conveniently applied to a conventional two high ro-lling mill, each stand of which includes a housing 5, an upper roll 6 and a bottom roll 1.

In the form of Fig. 1, I have shown the polishing device. or the polisher per se, positioned tovoperate on the lower roll 1 and in the form -of Fig. 3, on the upper roll 6; in both cases the driving power is derived from the positively driven lower `roll of the mill or stand.

-Particularly referring first to the form of Figs. 1 and v2, 8 designates a coupling or couplingbox associated with a wabble w of the lower roll l, and' 9 an eccentric strap positioned on an actuating eccentric 9a.of thev coupling and having a two-part slotted lug with a pivot pin l0 carried thereby. An adjustable connecting rod II having a hook connection IIa for engagement with the pin I0, leads therefrom, to a bifurcated arm I2 to which the rod II is connected. Arm I2 is iixedly supported on a horizontally extending turnable or partially rotatable shaft I3 supported on apertured lugs I3a. on the housing 5. It will be apparent that reciprocating movements of the pin I0, will, through the described connections, alternately turn shaft I3.

A characteristic and important feature of the present invention resides in means for imparting to the'polishing stones or blocks an arcuate motion and corresponding scrubbing action while in contact with the Working face or surface of the roll being treated.. The means for effecting this scrubbing action include an upright roller arm I4 xedly secured to shaft I3 designed to cooperate with the inclined slot of a cam-plate I5; and a plurality of lever ams I6, I6a, or more, extending downwardly and inwardly towards the surface of the lower roll 1. The upper end of the lever arm I5 as well as the lever arms I6a, etc. are each provided at one end with an adjustable weight w and at their other ends, adjacent the surface of the lower roll, with means for supporting one or a number of sets of polishing blocks made up of single or independent plural polishing stones designated I9. It will be noted that the lever arms are connected, as by bar Ib, and that cam-plate I5 is integrally secured to or forms part of the first lever I6 and that the lever I6 and Ia, or additional similar levers, are pivotally connected to a framing member I1 at I 8. Member I1 also acts as a supporting fulcrum for the lever arms I5 etc.

Connected with the lever I5 and extending horizontally therefrom, is the slotted connecting bar Ib designed to have the successive lever or levers Ita, etc. connected to it. 'I'he lever IGa is also pivotally connected to the framing member I1 as at I8 in a manner similar to the lever I6, as are also any additional levers.

Removable stone holders 5I having handles 52 are employed. These holders Vare respectively supported on plates 53 mounted on and carried by the ends of the levers I6 etc., and one of the plates 53 is suitably secured to its lever, as by a retaining lug to permit a slight turning movement so as to always assure the polishing stones having the desired surface contact with the roll.

Lever I6 is connected with and movable by the movement of cam I5, which latter arm in turn as above described is moved by the alternating rotation of shaft I3. The horizontally extending bar |619 to which the lever Ia is connected is secured to the lever arm I6. The movement of the lever I6 through said connecting bar |619 will thus move the one or more levers I6a with movements corresponding to the movement of lever I5, as actuated by cam I5.

Thus reciprocating action of bar II imparts alternating rotation to shaft I3 and its arm I4 in the slot of cam-plate I5. The cam-plate being directly connected with the adjacent lever arm IE of the connected series of such arms, all of the several arms I5, Iia, etc. are moved laterally on their hinge or pivot mountings I8 of framing member I1.

By such mounting and resulting alternating back and forth movement of the stone supporting lower terminals of levers I6, Ia, etc. each lever terminal will thus move in a reversing series of back and forth arcuate paths d, with relation to pivoting connection I8, generally lengthwise of the roll, as indicated in Fig. '1.

The stone or block holders 5I are arranged so as to extend across the major portion of the width of the roll being treated. In the drawings I have shown a plurality of holders with two stones only in each holder. In practice however, for example, on a 36 roll I may employ five stones and two holders, two stones in one holder and three stones in another holder. For 44 rolls six stones may be employed in three holders with two stones in each. For 48 rolls seven stones, two holders with two stones each therein and one holder with three stones. For 56ii rolls eight stones, four holders with two stones each. For 60 rolls nine stones, three holders with two stones each and one holder with three stones. For 68" rolls ten stones, ive holders with two stones each.

In the form of Fig. 1 in addition to the arcuate movements, or scrubbing action, of the stones just described, I contemplate moving the holders and their stones laterally of the roll by means actuated through the turnable shaft I3.

As illustrated and as preferred, these means include a worm screw shaft 20 having a connecting element or arm 2l at one end for engagement with and for imparting relatively slow back and forth movement to the lever supporting member I1, and a ratchet or gear and pawl assembly including gear 22 the hub of which constitutes a worm nut on shaft 20, and pawls 23 and 5I.

The rotation of worm shaft 25 is effected by means, including a bifurcated arm or lever 25 xedly secured to shaft I3, a connecting rod 26 pivotally connected to the arm 25 at one end and at its opposite end to another bifurcated arm 21 at pivot point 28. The ratchet or gear 22 is disposed between the divided ar-ms 21 and the pawls 23 are pivotally attached thereto.

30 designates U-shaped casing members located at opposite ends of the polishing devices, each being fastened to the housing 5. Adapted to operate'within the U-shaped members 30, I provide carriages 3I into which projects at each side a stub shaft 32 connected to the reciprocating frame structure I1.

On the end of shaft 2D is a nut 33 which is slidably connected to an arm 34 pivoted on housing 5 at 35.

One end of the arm 34 is pivotally connected to an upright member 36. Arm 36 at its upper end is pivotally connected to a transversely extending arm 31 at 38, 31 in turn being pivoted to the housing 5 at 39.

It will be noted that this construction permits a slight up and down movement of arm 31. Arm 31 at its opposite end is connected to a link 40, said link 4i) engaging a link 4I which latter is secured to a barrel-like tubular structure 42. This structure 42 has two weight balls 43 disposed therein, for opposite tipping followed by gravitation of the balls. This barrel-like structure is also provided with bumper devices 44 adapted, when the barrel is tilted, to contact with another somewhat like structure 45 which also contains weight balls 46. Barrels 42 and 45 are respectively pivoted to the housing at 41 and 48 respectively, one spaced above the other as shown, for free tilting.

As above described, when the upper barrel is tilted by levers 34, 36, 31 it will actuate barrel 45 reversely with reversed tension on chains 49 and 50 for the purpose of freeing pawl 23 from theratchet 22, and simultaneously place aL pawl 5I into engagement with the ratchet 22 Thus it will be evident that a reversal of arms I6, I Ga, etc.and the reverse movement of the polisher elementsand carriage is accomplished,

by member Il as controlled by alternating` forward and back feed of shaft 20 by the ratchet andpawl mechanism under control of the hub nut of ratchet 22.

In the form of Figs. 3, 4, and 8, I have particularlyshown polishing apparatus designed for treatment ofthe upper roll 6o instead ofthe lower roll la. In this construction 8a designates a coupling or coupling-box of the character shown in the construction of Fig. 1 and as inthe form of Fig. 1 the coupling-box 8a is associated with a wabble w of the lowerl roll 1a. This form also includes an eccentric strap 9 positioned o the coupling and carrying a pin Illa.

An adjustable connecting rod. IIb having a hook connection with. the pin ls shown as in th form of Fig. 1.

The opposite end of the adjustable connecting rod Hb is connected with a depending member 21a, Icorresponding .somewhat to the member 21 of Fig. 1; said rod being pivotally connected to member 21a at the pivot point 21m.l

In the form of Figs. 3-4, the polishing stones lea are designed to have a lateral movement only relative tothe roll being treated, therefore the means shown in the form of Fig. 1 for accomplishing an arcuate scrubbing action .are

. omitted. In this form of my invention, however,

I contemplate using a plurality of polishing stone holders with. separate and independent stones Isa carried in the holders as in the form of Fig. 1.

In this form Za designates the Worm shaft having the gear and ratchet assembly substantially of a character shown in Fig. l associated therewith, the ratchet hub engaging the shaft as the worm nut. The rotation of the worm shaft o is effected in this instance by means of the double arm 21a attached as aforesaid to the pin Illa and actuated by the connecting rod IIb.

As shaft 20a is alternately moved forwardly and backwardly by the threaded` hub of the ratchet and pawl mechanism, the entire series of stones I9a is correspondingly moved lengthwise of the upper roll by arm 21a and shaft Illa.

The `construction and operation of such polishing means for the upper roll is applied, as shown in Figs. 3, 4, 5 and 8, to the descending ,face

of the roll at the receiving side of the mill, gen-y erally similar to the stone location at the descending face of the lower roll at the delivery side, as in Figs. 1 and 2.

Both constructions derive their actuating power from the eccentric strap 9 andits pin Illa and an oppositely extending connecting rod Il b having a similar hook connection vwith the pin.

The outer terminal of rod Hb is pivoted at 24a to the ends of arms 21a having the pawls 23a and 5ta engageable with the ratchet gear 22a, the hub of which is threaded for turning engagement with worm shaft 20a.

Also, a movable lworm nut 33C on shaft 20a is pivotally kconnected to an arm 36a at 35a. Such member `liliewise engages arm 31a at 38a, arm 31a being pivoted as at 39a. Arm 31a, like arm 3l, is connected to` a link Ma'secured to the tubular member 42a having the gravitating balls 43a, for opposite tipping. In the same manner the bumper devices 44o contact the tubular lever arm 45a for tipping same, withl its gravitating balls 45a. Tipping of arm 45a effects reverse action of chains 49a and 50a with corresponding pawl disengagement and engagement and reverr Ilia.

sal 'ofcmovement of shaft 20a.` Shaft I'la and the longitudinal series of stones lSa with their holders, refuse collectors, etc. is alternately moved lengthwise by arm 2Ia the end of which is in nut. engagement with threaded shaft 20a.

I In this manner the entire series of polishing stones 9-are moved longitudinally in a straight line `alternately back and forth across the face of theupper roll, in rotation. Shaft 20a is suitably supported in bearings 30a.

As shown in Figs. 3, 4 and 5 variable pressure of the longitudinally movable stones is controlled by temper springs 54 surrounding rods 55 engaging `lever arms 56 secured to the ends of shaft By `graduating the springs more or less, the pressure of the stones against the roll face may be adjusted as desired.

What. I claim is:

1. In an automatic polisher high mill, the combination with the coupling of the lower roll and an eccentric strap thereon, a plurality of independent polishing stones positioned adjacent a roll and extending across the major portion of the width of the roll, holders for the stones, and means including a pivotal mounting for the holders, a longitudinally movable shaft engaging said mounting for imparting main `back and. forth movements thereto, an alternating rotatable shaft having cam connection with the holders for imparting minor pivoting movements thereto during such main movements, and operating means for said shafts connecting them with the eccentric strap for effecting a combined lateraland arcuate movement of the stones on the surface of theroll.

2. In an automatic polisher for a roll of a two high mill, the combination with the coupling of the lower roll and a movement imparting element thereon, a plurality of independent polishing stones positioned adjacent a roll and extending across the major portion of the width of the roll, holders fory the stones, a main alternately movable pivoting support for the holders, and means including a rotatable shaft, a cam-plate engaged thereby, a. pivotal connecting lever mounted on said support between the cam-plate and the holders, and driving means between the said shaft and the movement imparting element on the coupling for effecting an arcuate movement of the stones on the surface of the roll.

3. In an automatic polisher for a roll of a two high mill, the combination with the coupling of the lower roll, of .an eccentric thereon, a plurality of independent polishing stones positioned adjacent aroll and 4extending across the major portion of they width of the roll, holders for the stones, and means connecting the holders and the coupling for effecting combined major lateral and minor arcuate movements of the stones on thesurf'ace of the roll, said means including. a rotatable shaft, `a drive rod connecting the shaft and the` eccentric, a cam-plate connected with the holders, said rotatable shaft having an arm cooperating Iwith the cam-plate for effecting said minor arcuate movements, a second shaft and means for imparting alternating longitudinal movement thereto, a holder support actuated thereby, land a pivotal connection between the holder support and holders.

4. In an automatic polisher for a roll of a two high mill, the combination with the coupling of the lower roll and an eccentric thereon, a plurality of independent polishing stones positioned adjacent a roll and extending across the major portion of thewidth of the roll, a laterally movfor a roll of a two movements able supporting member, stone holders connected with and spaced from the supporting member, means pivotally connecting the member and holders, means for effecting a combined arcuate and lateral movement of the stones on the roll including a rotatable shaft, a connection between the eccentric and the rotatable shaft, and a second longitudinally movable shaft driven through the rst shaft and connected with the supporting member for moving the stone holders laterally of the roll.

5. In an automatic polisher for a roll of' a two high mill, the combination with the coupling of the lower roll and an eccentric thereon, a plurality of independent polishing stones positioned adjacent a roll and extending across the major portion of the width of the roll, a laterally movable supporting member, stone holders connected with and spaced from the supporting member, means connecting the member and holders, means for effecting a combined arcuate and lateral movement of the stones on the roll including a rotatable shaft, and means connected therewith effecting continuous minor arcuate to the stone holders, a connection between the eccentric and the rotatable shaft, a second longitudinally movable shaft driven through the first shaft and connected with the supporting member for moving the stone holders laterally of the roll, and means associated with the second shaft for effecting major reciprocationV of the polishing stones relative to the working surface of the roll.

6. Means for polishing a roll of a two high mill by moving a polishing element across the face of the roll consisting of a support for the element,

an alternately acting longitudinally movable screw shaft, means connecting it with the polishing element support for corresponding alternating main back and forth movements, a ratchet wheel having a hub in threaded engagement with the shaft, apawl-supporting holder pivoted to the ratchet and having a pair of alternately actl ing pawls, a midway pivoted tilting beam having gravitating weights and oppositely acting connections with the pawls for alternating pawl engagement with the ratchet, means effecting tilting of the beam operatively connected with the screw shaft, and means connecting the pawl-supporting holder reciprocably with actuating means carried by one of the rolls.

'7. Means for polishing a roll of a two high mill by moving a polishing element across the face of the roll consisting of a support for the element, an alternately acting longitudinally movable screw shaft, means connecting it with the polishing element support for corresponding alternating main back and forth movements, a ratchet wheel having a hub in threaded engagement with the shaft, a pawl-supporting holder pivoted to the ratchet and having a pair of alternately acting pawls, a midway pivotal tilting beam having gravitating weights and oppositely acting connections with the pawls for alternating pawl engagement with the ratchet, means effecting tilting of the beam operatively connected with the screw shaft, an eccentric actuated by the mill, and means connecting the pawl-supporting holder with the eccentric.

8. Means for polishinga roll of a two high mill by moving a polishing element across the face of the roll consisting of a support for the element, an alternately acting longitudinally movable screw shaft, means connecting it with the polishing element support for corresponding alternating main back and forth movements, a ratchet wheel having a hub in threaded engagement with the shaft, a pawl-supporting holder pivoted to the ratchet and having a pair of alternately acting pawls, a midway pivoted tilting beam having gravitating Weights and oppositely acting connections with the pawls for alternating pawl engagement with the ratchet, means effecting tilting of the beam operatively connected with the screw shaft, an eccentric mounted on one of the rolls. having a surrounding strap, and a connecting rod between the strap and the pawl holder for actuating the ratchet in one direction or the other When either pawl is in engagement therewith.

9. Means for polishing a roll of a two high mill by moving a polishing element across the face of the roll consisting of a support for the element, an alternately acting longitudinally movable screw shaft, means connecting it with the polishing element support for corresponding alternating main back and forth movements, a ratchet wheel having a hub in threaded engagement with the shaft, a pawl-supporting holder pivoted to the ratchet and having a pair of alternately acting pawls, a midway pivoted tilting beam having gravitating weights and oppositely acting connections with the pawls for alternating pawl engagement with the ratchet, means effecting tilting of the beam operatively connected with the screw shaft, means connecting the pawl-supporting holder reciprocably with actuating means carried by one of the rolls, and means for effecting varying pressure of the polishing element and its holder against the face of the roll.

l0. Means for polishing a roll of a two high mill by moving a polishing element across the face of the roll consisting of a support for the element, an alternately acting screw shaft, means connecting it with the polishing element support for corresponding alternating main back and forth movements, a ratchet wheel having a hub in threaded engagement with the shaft, a pawlsupporting holder pivoted to the ratchet and having a pair of alternately acting pawls, a tilt- Ving beam having oppositely acting connections with the pawls for alternating pawl engagement with the ratchet, means operatively connected with` the screw shaft for effecting tilting of the beam, supplemental means for imparting to the polishing element support additional movements during said main movements, and means effecting said main and additional movements connected with and deriving power from one of the rolls of the mill.

1l. In combination with the rolls of a twohigh mill, a supporting lever having at its inner end a polishing stone and at its outer end a slotted cam, an intermediate actuating member pivotally connected with the lever and having a screw shaft, ratchet and pawl actuating mechanism for the screw shaft, a reversely rotatable shaft having an arm engaging the cam for alternate movement of the lever on its pivotal connection with said actuating member, means for rotating the ratchet on the screw shaft, means controlled by screw shaft movement for reversing the ratchet pawls for return movement of the screw shaft, and means connected with one of the rolls of the mill and said reversely rotatable shaft and the ratchet mechanism for transmitting motion to said shaft.

12. In roll polishing apparatus, a reciprocably moving lever-supporting member, an inclined stone supporting lever pivotally and freely mounted` between its ends on said reciprocably moving member, means for moving the lever laterally and alternately on its pivotal mounting, an outer counterweight on the free end of the lever, ay removable stone holder having a handle on the inner opposite end ofthe lever, and a support for the stone holder on the inner active end of the lever.

13. 'In roll polishing apparatus, a reciprocably moving lever-supporting member, a stone supporting lever pivotally mounted between its ends on said reoiprocably moving member, means for moving the lever laterally and alternatelyon its pivotal mounting during each major main back and rforth movement, means for moving the lever on its supporting member in minor arcuate mul- K tiples of such main movements, a slotted cam on the lever, an alternately rotatable shaft having an actuating arm therefor, means for actuating the shaft, a stone holder. support on the inner f' end of the lever adjacent the roll being polished, and a stone holder having a handle for placement of the holder on said support.

14.111 an automatic roll polisher having a l stone supporting lever and a reciprocating member pivotally engaging the lever, a longitudinally movable worm shaft for moving said member, an

`actuating ratchet wheel therefor, a pawl-carrying frame pivoted on the ratchet wheel provided with a pair of Single acting pawls, a midway .Y

pivoted tilting beam having terminal flexible connections with each pawl, and means actuated Vby the worm shaft for reversely tilting the beam movable worm shaft for moving said member, an

actuating ratchet wheel therefor in threaded engagement with the worm shaft, a pawl-carrying frame pivoted on the ratchet Wheel provided with a pair of single acting pawls, a tilting beam having flexible connections With each pawl, a lever and means controlled thereby for tilting the beam, and a nut on the worm shaft operatively connected with said lever for reversely tilting the beam t-o change the operative relations of the pawls to reverse the direction of movement of the Worm shaft.

16. Means for polishing a roll of a two high mill by moving a polishing element across the face of the roll with alternating arcuate movement thereof consisting of a pivotal Support for the element, a longitudinally movable alternately acting screw shaft, means connecting it with the polishing element support for corresponding alternating main back and forth movements, a ratchet wheel having a hub in threaded engagement with the shaft, a pawl-supporting holder pivoted to the ratchet wheel and having a pair of alternately acting pawls, amidway pivoted tilting beam having oppositely acting connections With the pawls for alternating pawl engagement with the ratchet, and means operatively connected with the screw shaft for effecting tilting of the beam and reverse movement of the screw shaft.

17. Means for polishing a roll of a two high,

mill by moving a polishing element across the face of the roll with alternating arcuate moven ment thereof consisting of a pivotal support for the element, a longitudinally movable alternately acting screw shaft, means connecting it with the polishing element support for corresponding alternating main back and forth movements, a

`ratchet wheel having a hub in threaded engagement with the shaft, a paWl-supporting holder ivoted to the ratchet wheel and having a pair of alternately acting pawls, a midway pivoted tilting beam having oppositely acting connections with the pawls for alternating pawl engagement with the ratchet, lever mechanism operatively connected'with the tilting beam, and a nut threaded on the screw shaft and in operative connection with the lever mechanism for tilting the beam.

PAUL K. PISARCIK. 

